Palladium-Catalyzed Synthesis of Ammonium Sulfinates from Aryl Halides and a Sulfur Dioxide Surrogate: A Gas- and Reductant-Free Process
作者:Edward J. Emmett、Barry R. Hayter、Michael C. Willis
DOI:10.1002/anie.201404527
日期:2014.9.15
range of useful molecules and materials, and despite a variety of preparative methods being available, processes which introduce the most basic sulfonyl building block, sulfur dioxide, using catalytic methods, are rare. Described herein is a simple reaction system consisting of the sulfur dioxide surrogate DABSO, triethylamine, and a palladium(0) catalyst for effective convertion of a broad range of
磺酰基衍生的官能团填充了广泛的有用分子和材料,尽管有多种制备方法可用,但使用催化方法引入最基本的磺酰基结构单元二氧化硫的方法很少见。本文描述的是由二氧化硫替代物 DABSO、三乙胺和钯 (0) 催化剂组成的简单反应系统,用于将多种芳基和杂芳基卤化物有效转化为相应的亚磺酸铵。这种无气体和无还原剂的反应的主要特点包括可以使用的钯 (1 mol%) 和配体 (1.5 mol%) 的低负载量,以及使用异丙醇作为溶剂和形式还原剂。亚磺酸铵产品原位转化为各种含磺酰基的官能团,包括砜、磺酰氯和磺酰胺。